asteroids over 10 kilometers in diameter moving at speeds over 50 kilometers per second have collided with SCP-3485 and left no signs of damage.

You've said that this thing is larger than the sun. An asteroid 10km in diameter would be less than a grain of sand to it. Traveling at 50 km/ second, it would take the asteroid over eight hours to pass from one end of the creature to the other. For 3485 to be immune to damage from such an asteroid is hardly anomalous.

Again, no shit: it's larger than the sun. Do you realize how thick its shell is? If we assume proportionality, and there's no reason we shouldn't, then at its thinnest the shell would be well over ten thousand kilometers thick. You expect to drill through that?

To digest this material, SCP-3485 has three anomalous stomachs that immerse the material into a cooling solution, then ignites it in a poorly understood way to release its energy, This energy is absorbed by the stomach wall and transported throughout the body. This digestive system is capable of complete mass-energy conversion, and produces no waste products.

How does the Foundation know this? Have expeditions been inside the creature and counted its stomachs? Bear in mind that its stomachs would be larger than the Earth.

extra volume used to contain pressurized air. In order to travel through space, SCP-3485 opens multiple pores on its shell to release this air in bursts

… this creature is larger than the sun. Do you realize how much it would mass?

When I first joined this site, I expected to see nothing but terrifying monsters that go bump in the night, gruesome humanoids with fingernails for teeth and other utter horrors from the darkest abyss. But when I looked into the abyss, the big space lobster looked back.

I kind of like the idea of a big-ass space lobster just chilling there, but I do have a few gripes:

"Class-A amnestics are to be administered to remove memories of SCP-3485" sounds a little redundant. It's like saying, "I take sleeping pills to help me sleep."

But the lobster in the room for me is the fact that the Crab Nebula is over six thousand light-years away from Earth. This means that everything we observed took place right about when Egypt was dealing with a whole lot of bad shit coming out of the sky and a massive labor shortage in the pyramid business. This leads to two major problems.

First, all data regarding SCP-3485 is way out of date, including its current whereabouts. There is no point sending an expedition out there to try and save its life or make observations before it dies, because that already happened before a certain Indian man went on walkabout and accidentally became a god.

The second major problem is that even if the Foundation is hiding some wonderful tech from the rest of the world, that puts them maybe a century ahead of the curve. How are you planning on sending an expedition there at several thousand times the speed of light?

The way I see it, the easiest way to make the logistics work would be to piggyback onto some of the stuff established by events such as Project Heimdall. There are probably several SCPs or tales establishing FTL travel and communication if you choose to crosslink, but with no explanation there is no way to make an expedition work.

Keter dictates containment difficulty. This thing is impossible to contain, and if it decided it wanted to nibble on our sun there would be nothing we could do to stop it. It has the potential to wipe out all life on earth, and we don't even register on its perceptual radar — therefore, Keter.

Also, it doesn't need FTL at all. 17 l.y. may mean it takes hundreds and hundreds of years to reach us, but that still makes it a massive threat. A fraction of lightspeed would be enough to get it here in a relatively timely fashion.

It needs FTL to be "transporting" itself from star to star, apparently instantaneously, as stated in the log.

Expelling air as reaction mass has terrible ISP anyway. The physics here doesn't work at all (this thing should collapse in on itself, if it were as dense as a lobster at this size), so it's hard to really say how much thrust it would get, though.

Let's say it is maintained by anomalous law to not collapse into a blackhole, assuming the various circulatory systems and gas sac halved its density from normal lobster density, how much would it probably weigh—and how much gas it would need to expel to accelerate itself to a reasonable pace within a solar system?

it would be a lobster that farts out planet-sized gas bubbles, which is comedic in its own way, but too ridiculous and impractical—it would exhaust its reserves long before it reach the edge of the system.

"…created by stars during fission reactions, such as leftover hydrogen and helium. "

shouldn't that be "fusion"?

anyway, glad to see you took my suggestion and did your own thing with it, it's probably better than what I was suggesting. The incredibly lengthy story imo would have dragged this scip down, so taking that out was a good move. I still have the minor gripe I spoke about; while it may _look_ like a lobster, clearly this thing is quite different, and it doesn't appear that the Foundation was able to collect DNA samples.

The changes are decent; what you could do is mention that when a teleportation event occurs, there's a flash of light similar in luminosity to a supernova and a surge of gamma radiation, or something along those lines, to indicate that wormholes are involves somehow. Perhaps when it created a worm hole at some time in its normal universe, something went wrong and it ended up in ours.

It's a downvote from me. It's a lobster that eats stars and do FTL, sure, but then again I played Stellaris last week and encountered at least two species of star eaters and two others that feeds on gas giants. The story of it finding carcass of its own kind is also too bland to my liking, it came out as forced attempt to add story to a complete article about weird creature.

And then there's the complaint about the incomplete physics that others has complained about. But then again, it's an anomaly.